Geography type SQL Server R2 - Query to populate a new Geography Field with known Lat/long data


i love idea special geo type make easier , faster find places in data table in radius of given lat/long..

so thinking should able write relativity simple query create , populate new column or new table  geo information (if new table linking id)

something of course not working @ all...

create table geolocatons
select places.id,  geography::stpointfromtext(lat & long) geodata
places

i have no idea @ point syntax of geography::stpointfromtext(lat & long) part is...

seems common need can't find straight forward example...

 

 

 

 

 

- 10spotdomain domain , domain related needs

ok here answer have found works, below link whole thing...

http://www.sql-server-helper.com/sql-server-2008/convert-latitude-longitude-to-geography-point.aspx

here part needed:

the problem format 'argument' geography ::stpointfromtext function odd - must string contains text ==> point... etc see in example below.  works!

using geography::stpointfromtext

the first thing add new column store geography point.  can done alter table statement , use geography data type new column.

alter table [dbo].[landmark] add [geolocation] geography go

to convert latitude , longitude coordinates geography point, use stpointfromtext function.  stpointfromtext returns geography instance open geospatial consortium (ogc) well-known text (wkt) representation.

update [dbo].[landmark] set [geolocation] = geography::stpointfromtext('point(' + cast([longitude] varchar(20)) + ' ' +            cast([latitude] varchar(20)) + ')', 4326) go
- 10spotdomain domain , domain related needs


SQL Server  >  SQL Server Spatial



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